package com.atguigu.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.product.dao.AttrGroupDao;
import com.atguigu.product.dao.CategoryDao;
import com.atguigu.product.entity.*;
import com.atguigu.product.entity.*;
import com.atguigu.product.service.CategoryService;
import com.atguigu.product.service.ProductAttrValueService;
import com.atguigu.product.vo.AttrGroupRelationVo;
import com.atguigu.product.vo.AttrRespVo;
import com.atguigu.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.product.dao.AttrDao;
import com.atguigu.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

  @Resource
  AttrAttrgroupRelationDao relationDao;

  @Resource
  AttrGroupDao attrGroupDao;

  @Resource
  CategoryDao categoryDao;

  @Resource
  CategoryService categoryService;

  @Resource
  ProductAttrValueService productAttrValueService;

  @Override
  public PageUtils queryPage(Map<String, Object> params) {
    IPage<AttrEntity> page = this.page(
      new Query<AttrEntity>().getPage(params),
      new QueryWrapper<AttrEntity>()
    );

    return new PageUtils(page);
  }

  @Transactional
  @Override
  public void saveAttr(AttrVo attr) {
    AttrEntity attrEntity = new AttrEntity();
    BeanUtils.copyProperties(attr, attrEntity);
    //保存基本数据
    this.save(attrEntity);
    //保存关联关系
    if (attr.getAttrGroupId() != null && attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
      AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
      relationEntity.setAttrGroupId(attr.getAttrGroupId());
      relationEntity.setAttrId(attrEntity.getAttrId());
      relationDao.insert(relationEntity);
    }
  }

  @Override
  public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
    QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type", "base".equalsIgnoreCase(type) ? ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() : ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

    if (catelogId != 0) {
      queryWrapper.eq("catelog_id", catelogId);
    }

    String key = (String) params.get("key");
    if (!StringUtils.isEmpty(key)) {
      //attr_id  attr_name
      queryWrapper.and((wrapper) -> {
        wrapper.eq("attr_id", key).or().like("attr_name", key);
      });
    }

    IPage<AttrEntity> page = this.page(
      new Query<AttrEntity>().getPage(params),
      queryWrapper
    );

    PageUtils pageUtils = new PageUtils(page);
    List<AttrEntity> records = page.getRecords();
    List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
      AttrRespVo attrRespVo = new AttrRespVo();
      BeanUtils.copyProperties(attrEntity, attrRespVo);

      //1、设置分类和分组的名字
      if ("base".equalsIgnoreCase(type)) {
        AttrAttrgroupRelationEntity attrId = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
        if (attrId != null && attrId.getAttrGroupId() != null) {
          AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrId.getAttrGroupId());
          attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
        }

      }


      CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
      if (categoryEntity != null) {
        attrRespVo.setCatelogName(categoryEntity.getName());
      }
      return attrRespVo;
    }).collect(Collectors.toList());

    pageUtils.setList(respVos);
    return pageUtils;
  }

  @Override
  public AttrRespVo getAttrInfo(Long attrId) {
    AttrRespVo respVo = new AttrRespVo();
    AttrEntity attrEntity = this.getById(attrId);
    BeanUtils.copyProperties(attrEntity, respVo);

    if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
      //设置分组信息
      AttrAttrgroupRelationEntity attrgroupRelationEntity = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
      if (attrgroupRelationEntity != null) {
        respVo.setAttrGroupId(attrgroupRelationEntity.getAttrGroupId());
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelationEntity.getAttrGroupId());
        if (attrGroupEntity != null) {
          respVo.setGroupName(attrGroupEntity.getAttrGroupName());
        }
      }
    }


    //设置分类信息
    Long catelogId = attrEntity.getCatelogId();
    Long[] catelogPath = categoryService.findCatelogPath(catelogId);
    respVo.setCatelogPath(catelogPath);
    CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
    if (categoryEntity != null) {
      respVo.setCatelogName(categoryEntity.getName());

    }
    return respVo;
  }

  @Override
  @Transactional
  public void updateAttr(AttrVo attr) {
    AttrEntity attrEntity = new AttrEntity();
    BeanUtils.copyProperties(attr, attrEntity);
    updateById(attrEntity);

    if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {

      //修改分组关联
      AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();

      relationEntity.setAttrGroupId(attr.getAttrGroupId());
      relationEntity.setAttrId((attr.getAttrId()));

      Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
      if (count > 0) {
        relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
      } else {
        relationDao.insert(relationEntity);
      }
    }
  }

  /**
   * 根据分组ID查询关联的所有属性
   *
   * @param attrgroupId
   * @return
   */
  @Override
  public List<AttrEntity> getRelationAttr(Long attrgroupId) {
    List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));
    List<Long> attrIds = entities.stream().map(AttrAttrgroupRelationEntity::getAttrId).collect(Collectors.toList());
    if (attrIds == null || attrIds.size() == 0) return null;
    Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
    return (List<AttrEntity>) attrEntities;
  }

  @Override
  public void deleteRelation(AttrGroupRelationVo[] vos) {
//        relationDao.delete(new QueryWrapper<>().eq("attr_id",1L).eq("attr_group_id")));
    List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map(item -> {
      AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
      BeanUtils.copyProperties(item, relationEntity);
      return relationEntity;
    }).collect(Collectors.toList());
    relationDao.deleteBatchRelation(entities);
  }

  @Override
  public PageUtils getNoRelationAttr(Map<String, Object> params, String attrgroupId) {
    //1、当前分组只能关联自己所属的分类里面的所有属性
    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
    Long catelogId = attrGroupEntity.getCatelogId();
    //2、当前分组只能关联别的分组没有引用的属性
    //2-1、当前分类下的其他分组
    List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
    List<Long> collect = group.stream().map(item -> item.getAttrGroupId()).collect(Collectors.toList());
    //2-2、这些分组的关联
    List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
    List<Long> attrIds = groupId.stream().map(item -> item.getAttrId()).collect(Collectors.toList());
    //2-3、从这些分类的所有属性中移除这些属性
    //TODO 后期代码抽取
    QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
    if (attrIds != null && attrIds.size() > 0) {
      queryWrapper.notIn("attr_id", attrIds);
    }
    String key = (String) params.get("key");
    if (!StringUtils.isEmpty(key)) {
      queryWrapper.and(w -> {
        w.eq("attr_id", key).or().like("attr_name", key);
      });
    }
    IPage<AttrEntity> page = page(new Query<AttrEntity>().getPage(params), queryWrapper);
    PageUtils pageUtils = new PageUtils(page);
    return pageUtils;
  }


  @Override
  public List<Long> selectSearchAttrIds(List<Long> attrIds) {
    return baseMapper.selectSearchAttrIds(attrIds);
  }

  @Override
  public List<ProductAttrValueEntity> listAttrsforSpu(Long spuId) {
    List<ProductAttrValueEntity> list = productAttrValueService.list(new QueryWrapper<ProductAttrValueEntity>().eq("spu_id", spuId));
    return list;
  }

  @Override
  public void updateSpuAttrs(Long spuId, List<ProductAttrValueEntity> attrValueEntities) {
    for (ProductAttrValueEntity attrValueEntity : attrValueEntities) {
      attrValueEntity.setSpuId(spuId);
      productAttrValueService.update(attrValueEntity,
        new UpdateWrapper<ProductAttrValueEntity>().eq("spu_id", spuId).eq("attr_id", attrValueEntity.getAttrId()));
    }
  }
}
